The Kodak Retina cameras were a series of 35mm folding cameras produced by Kodak from 1934-1969. They were known for their compact size and excellent lenses, which were manufactured by Schneider-Kreuznach. The Retina series was popular among amateur photographers and professionals alike, with models like the Retina IIIS offering advanced features such as a built-in light meter and interchangeable lenses.